An argument could be made that any of these reasons are related to climate change, but most of the reporting on the increased wildfires does not make this connection. I understand that journalistic best practices prevent journalists from making such connections without strong supporting evidence -- a smoking gun.
But, in the case of wildfires, there is a pretty clear smoking gun -- the pine bark beetle. Stay with me. Many reputable news sources have reported the increase in the pine bark beetle in recent years; and that the increase is due, in large part, to climate change (see "Bark beetles, aided by climate change, are devastating U.S. pine forests" http://wpo.st/u71i1) The trees killed by the pine bark beetle are becoming fuel for the more severe wildfires we are seeing today.
Journalists: I beg of you, Please connect the dots!